Dyestuffs capable of being chromed and process of making same



EMIL REBER, OF BASEL, SWITZERLAND,

DUSTRY IN BASLE, OF

DYESTUFFS CAPABLE lilo Drawing.

To all whom it may concern:

Be it known that I, EMIL REBER, a citizen of the Swiss Republic, andresident of Basel, Switzerland, have invented new and useful.

Dyestuffs Capable of Being Chromed and Processes of Making Same, ofwhich the following is a full, clear, and exact specification.

I have found that new mordant dyeing dyestuffs can be obtained which canbe chromed on animal fiber by coupling, in presence of calciumhydroxide, l-amino-5- oxynaphthalene-T-sulfonic acid with thediazo-compounds derived from 2-amino-1- phenol containing one nitrogroup in another position than 3 and 5. The dyestuffs thus obtained,which correspond with the general formula:

wherein R designates a Q-amino-l-phenol radical containing one nitrogroup in another position than 3 and 5, and R the radical of thel-amino-5-oxynaphthalene-7 sulfonic acid, constitute deep blackishpowders dissolving in water to violet blue to blue solutions, and insulfuric acid to violet red to bluish red colorations. They dye wool inan acid bath brown-violet to blue tints which become more or lessgreenish to bluish deep black when subsequently chromed, the dyeings'being very fast to light, fulling and potting.

The invention is illustrated by the following example:

24 parts of 1-amino-5-oxynaphthalene-7- sulfonic acid are dissolved withheating in 150 parts of water containing 10 parts of calcium hydroxide;the solution at 05 40 C. is mixed with an aqueous suspension,

made slightly acid to congo, of the diazocompound from 15.5 parts of4-nitro-2- amino-phenol, 15 parts of hydrochloric acid and 7 parts ofsodium nitrite dissolved in 300 parts of water. The coupling occurs atonce and is completed in about 20 minutes with formation of abrownish-black magma of dyestuff.

The dyestulf may be isolated by acidifying and filtering or byneutralizing the small quantity of free lime by heating with sodiumcarbonate, then filtering from calcium carbonate and salting out thedyestuif from the filtrate by means of common salt.

The dyestuff is obtained by this last method Application filed February5, 1923.

FFEQES EPA ASS'IGNOR TO SOCIETY OF CHEMICAL IN- BASEL, SWITZERLAND.

OF BEING CHROME!) AND PROCESS OF MAKING SAME.

Serial No. 617,174.

able the dyeing properdyestuffs obtainable 1n invention are given:

C010m Co1om Tints on n 001. Appeartiofii of tiolrli of ance t e t eDmzo'componeut' of the solution solution Direct 2 dycstull. in in dyeingchromed.

4-nitro-2-amino- Blackish Violet Bluish Violet Greenish phenol. powblue. red. brown. d e e p clers. black. 4-nitro-6-chloro- Violet D a rk 2-ami'nopheiiol. red. blue 6-nitro- 4- chloro- Blue Bluish B In i s h2-amin0p11enol. red. d e e black. 6-nitro-4-methyl- Reddish Bluish2-aminophenol. ue. black. 4-nitro-6-methyl- Violet D e e p2-aminophenol. brown. black. m

What I claim is:

l. The herein described new process for the manufacture of new mordantdyeing dyestuffs resulting from coupling, in the presence of calciumhydroxide, of l-amino- 5-oxyn'aphthalene-7-sulfonic acid with thediazo-compounds derived from 2-amino-1- phenol containing one nitrogroup in another position than in 3 and 5.

2. The herein described new process for the manufacture of new mordantdyeing dyestuffs resulting from coupling, in the presence of calciumhydroxide, of l-amino- 5-oxynaphthalene-7-sulfonic acid with thediazo-compounds derived from EZ-amino-lphenol containing one nitro groupin position 4:.

3. The herein described new dyestufis resulting from coupling, in thepresence of calcium hydroxide, of 1-amino-5-oxynaphthalene-7-sulfonicacid with the diazo-compounds derived from 2-amino-1-phenol containingone nitrogroup in another position than in 3 and 5, corresponding withthe general formula RN=N t, wherein R signifies a 2-amino-1-phenolradical containing one nitro group in another position than in 3 and 5,and R a 1-amino-5-oxynaphthalene-7-sulfonic acid radical, whichconstitute blackish powders dissolving in water with violet blue to bluecolorations, and in sulfuric acid with violet red to bluish red 15e-oxynephthelenek"sulionic colorations and dye WOOl violet brown to darkblue tints which become more or less greenish to bluish deep black whensubsequently chromed.

4. lhe herein described new dyestuffs resulting from coupling, in thepresence of calcium hydroxide, or1-amino-5-oxynephtlialeiie-7-srilfoiiic acid with the diezo-conr poundsderived from Z-emino-Lphenol containing one nitro group in positioncorresponding with the general for-mule E-N N R", wherein R signifies eZ- amino-l-phenol radical containing group in position ei, and l5 atLuminoncid radical,

one nitro which constitute blackish powders dissolving in Water withViolet blue to blue colorations, and in sulfuric acid With Violet red tobluish red colorations and dye Wool violet brown to dark blue tintswhich become more or greenish to bluish deep black when subsequentlychromed.

in Witness whereof I have hereunto signed my name this 23rd day ofJanuary, 1923, in the presence of two subscribing Witnesses.

EVHL IREBER.

Witnesses Erin-inn BRAUNJ JULIA DURST.

